Operating Rails in Kubernetes

Transcript

1. Operating Rails in Kubernetes Kir Shatrov

2. 1. Intro to Kubernetes 2. Rails in Kubernetes 3. Shopify’s

   migration story

3. Containers are awesome! *

4. Containerizing Rails: Techniques, Pitfalls, & Best Practices by Daniel Azuma

   Tomorrow 3:30pm
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7. app01 app02 app03

8. app01 app02 app03

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12. Smart container scheduling for better utilization

13. Smart container scheduling for better utilization

14. Smart container scheduling for better utilization

15. Kubernetes basics: Pod

16. Kubernetes basics: Deployment

17. web jobs Kubernetes basics: Deployment

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20. web jobs Kubernetes basics: Deployment

21. web jobs Kubernetes basics: Deployment

22. web jobs Kubernetes basics: Deployment

23. Managing Resources

24. YAML

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26. YAML apply when changed

27. YAML store in repository

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29. Deploy process controlling servers

30. Deploy process sequentially applying commands by SSH

31. Capistrano sequentially applying commands by SSH

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33. kubectl apply --file web.yml

34. kubectl apply --file jobs.yml

35. Controlling servers vs describing configuration

36. Controlling servers Describing configuration running commands remotely comparing output with

    expected not prone to failures push configuration poll for it to apply abstracts from physical machines self-healing

37. Controlling servers Describing configuration running commands remotely comparing output with

    expected not prone to failures push configuration poll for it to apply abstracts from physical machines self-healing
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39. It's easy to run a container,
 but not Rails

40. The Twelve-Factor app

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42. Disposability and termination

43. Web requests

44. Background Jobs

45. Long-running jobs

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47. Abort and re-enqueue

48. Concurrency scale out via the process model

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50. Assets

51. rake assets:precompile

52. Assets Shipped in container

53. Database Migrations

54. Migrations as a part of deploy

55. Migrations as a part of deploy

56. Asynchronous Migrations

57. 1. Change code and add a migration 1. Add a

    migration 2. Change code

58. 1. Change code and add a migration 1. Add a

    migration 2. Change code

59. Asynchronous Migrations

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62. Secret Management

63. Secrets in the environment

64. Secrets in a container

65. Secrets in a container

66. Rails 5.2 Credentials

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68. ENV[‘RAILS_MASTER_KEY’]

69. The Twelve Factors Let workers terminate gracefully Migrations as a

    part of deploy can be fragile Rails 5.2 Credentials + Kubernetes Secrets

70. Kubernetes at Shopify

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72. Resource specs in YAML

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76. kubectl apply --file web.yml

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79. Let robots help humans to migrate apps Developers don’t have

    to write YAML configs kubernetes-deploy brings visibility into rollout progress
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81. Kubernetes helps organizations to efficiently schedule workload and save resources

    It’s not magic, it only schedules and runs your containers Things you need to know about Rails
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84. Thanks! @kirs @kirshatrov